Cd key computer transfer?

Question

i have an HP computer with decent graphics, but i just recently got a $2500 gaming rig

now how the h**l do i play all my games online?!

i need to "re-use" the cd keys or move files or sumpin idk sumthing with the IP adress maybe? help please

if u need to be specific, battlefield2, crysis, and a bunch of strategy games

Answer 1

yes, look on the back of the box and type your key in.

Answer 2

yeah you can reuse them. just don't be online at the same time or else they will ban that number.